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Finding the Fourth Proportional to 266,121, 399,291.12 and 195,404.76

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Solution

The fourth proportional to 266,121, 399,291.12 and 195,404.76 is: 293,187.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,121 : 399,291.12 = 195,404.76 : x
  2. Step 2: Convert to fraction form
    266,121/399,291.12 = 195,404.76/x
  3. Step 3: Cross multiply
    266,121x = 399,291.12 × 195,404.76
  4. Step 4: Simplify right side
    266,121x = 78,023,385,473.73
  5. Step 5: Solve for x
    x = 78,023,385,473.73/266,121
  6. Step 6: Final answer
    x = 293,187.63

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.